LOW! (you might want to consider a name change that's more positive...if so, just PM any of the mods for SBD and we'd be glad to fix it for you)
Here's the thing: if you take in less calories than you burn, you will lose weight. Sometimes other things get in the way and complicate this, but overall, it's true. SBD isn't something magical--it simply helps those of us who find that we overeat due to blood sugar dips by keeping our blood sugar steady. Thus, when we're OP, we don't overeat and we lose weight. It's possible that you were eating too much on plan food, but when you had stuff off plan, you ate less (perhaps because you felt guilty
or more satisfied after?) and then you lost. There could be a million reasons.
What you do need to figure out is this: does SBD work for you. If you don't find yourself overeating when you have sugar and simple starches, but you do find that you feel deprived when you don't get them (and thus, overeat), you might be a better fit for a program like Weight Watchers, where you can pick a program that lets you eat from a wide variety of sources as long as you limit portion size.
However, if you think that eating sugars and simple starches leads you to craving and eating more than you should, then you may find SBD is right for you. If so, then you need to do Phase 1 again to get the sugar out of your system and start over again. When you get stuck, come see us and we'll try to figure it out. Getting stuck is part of the journey.